U.S. patent application number 16/078015 was filed with the patent office on 2019-02-14 for quick connect plug for cables.
This patent application is currently assigned to HEFEI SANYU ELECTRIC CO., LTD. The applicant listed for this patent is HEFEI SANYU ELECTRIC CO., LTD. Invention is credited to Jun HUANG.
Application Number | 20190051998 16/078015 |
Document ID | / |
Family ID | 56545349 |
Filed Date | 2019-02-14 |
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United States Patent
Application |
20190051998 |
Kind Code |
A1 |
HUANG; Jun |
February 14, 2019 |
QUICK CONNECT PLUG FOR CABLES
Abstract
A quick connect plug for cables includes a connecting portion
configured to connect a cable and a plug pin configured to form a
plug-in connection with a socket. The plug pin is fixedly provided
with a plug-in unit. A portion of the plug-in unit protruding out
of an external annular surface of the plug pin forms a locking head
matched with a socket slot. A gap is provided between a portion of
the plug-in unit near the locking head and the plug pin, so as to
enable the locking head to move along an axis direction of the plug
pin, and the gap can limit the maximum displacement of the locking
head. By providing a plug-in unit and a gap between the portion of
the plug-in unit near the locking head and the plug pin, the
plug-in unit is enabled to move, thus having certain
elasticity.
Inventors: |
HUANG; Jun; (Hefei,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HEFEI SANYU ELECTRIC CO., LTD |
Hefei |
|
CN |
|
|
Assignee: |
HEFEI SANYU ELECTRIC CO.,
LTD
Hefei
CN
|
Family ID: |
56545349 |
Appl. No.: |
16/078015 |
Filed: |
January 17, 2017 |
PCT Filed: |
January 17, 2017 |
PCT NO: |
PCT/CN2017/071353 |
371 Date: |
August 21, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01R 4/36 20130101; H01R
11/11 20130101; H01R 13/05 20130101; H01R 13/213 20130101; H01R
13/6215 20130101 |
International
Class: |
H01R 11/11 20060101
H01R011/11; H01R 13/213 20060101 H01R013/213; H01R 13/05 20060101
H01R013/05; H01R 13/621 20060101 H01R013/621; H01R 4/36 20060101
H01R004/36 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 26, 2016 |
CN |
201620148653.9 |
Claims
1. A quick connect plug for cables, comprising: a connecting
portion configured to connect a cable and a plug pin configured to
form a plug-in connection with a socket; wherein the plug pin is
fixedly provided with a plug-in unit; a portion of the plug-in unit
protruding out of an external annular surface of the plug forms a
locking head matched with a socket slot; a gap is provided between
a portion of the plug-in unit near the locking head and the plug
pin, so as to enable the locking head to move along an axis
direction of the plug pin, and the gap can limit a maximum
displacement of the locking head.
2. The quick connect plug for cables according to claim 1, wherein
a first end of the plug-in unit protrudes out of the external
annular surface of the plug pin to form the locking head, and a
second end of the plug-in unit is fixedly connected to the plug
pin.
3. The quick connect plug for cables according to claim 1, wherein
both ends of the plug-in unit protrude out of the external annular
surface of the plug pin--to form two locking heads, and the two
locking heads are symmetrical with respect to a center of the plug
pin; and a middle portion of the plug-in unit is fixedly connected
to the plug pin.
4. The quick connect plug for cables according to claim 2, wherein
the plug pin is provided with a stepped hole; the stepped hole
comprises a small hole section and a large hole section; the
plug-in unit is a straight rod; a first end of the straight rod is
inserted into the small hole section to form an interference fit
with the small hole section, or the straight rod and the small hole
section are in a screw thread fit; a second end of the straight rod
passes through the large hole section and extends out of the
external annular surface of the plug pin to form the locking head;
and a diameter of the straight rod is less than a diameter of the
large hole section.
5. The quick connect plug for cables according to claim 4, wherein
axes of the small hole section and the large hole section of the
stepped hole are perpendicular to an axis of the plug pin; the
small hole section and the large hole section are concentrically
arranged; or a side of the small hole section near the connecting
portion is aligned with a side of the large hole section near the
connecting portion.
6. The quick connect plug for cables according to claim 4, wherein
section profiles of the plug-in unit and the stepped hole are
round, waist-shaped, square, or elliptic.
7. The quick connect plug for cables according to claim 2, wherein
the plug pin is provided with a through hole, and the plug-in unit
is a straight rod; the straight rod comprises a large-diameter rod
section and a small-diameter rod section; the large-diameter rod
section is inserted into the through hole to form an interference
fit with the through hole; or the large-diameter rod section and
the through hole are in a screw thread fit; the small-diameter rod
section passes through the through hole and extends out of the
external annular surface of the plug pin to form the locking head;
and a diameter of the small-diameter rod section is less than a
diameter of the through hole.
8. The quick connect plug for cables according to claim 2, wherein
an end face of a side of the plug pin away from the connecting
piece is provided with a recess; the plug-in unit is plate-like and
located in the recess; the first end of the plug-in unit extends
out of the external annular surface of the plug pin to form the
locking head; a side of the plug-in unit away from the connecting
piece is provided with a pressing plate; a side of the plug-in unit
away from the locking head fits the pressing plate and is fixed on
the plug pin with a screw; and a gap is formed between the portion
of the plug-in unit near the locking head--and the pressing
plate.
9. The quick connect plug for cables according to claim 8, wherein
the plug-in unit has a uniform thickness; a side of the pressing
plate near the locking head is wedge-shaped; or a plate thickness
of the side of the pressing plate near the locking head is less
than a plate thickness of a side of the pressing plate away from
the locking head to form the gap.
10. The quick connect plug for cables according to claim 8, wherein
the pressing plate has a uniform thickness, and the side of the
plug-in unit near the locking head is wedge-shaped; or a plate
thickness of the side of the plug-in unit near the locking head is
less than a plate thickness of the side of the plug-in unit away
from the locking head to form the gap.
11. The quick connect plug for cables according to claim 5, wherein
section profiles of the plug-in unit and the stepped hole are
round, waist-shaped, square, or elliptic.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is the national phase entry of
International Application PCT/CN2017/071353, filed on Jan. 17, 2017
which is based upon and claims priority to Chinese Patent
Application No. 201620148653.9, filed on Feb. 26, 2016 the entire
contents of which are incorporated herein by reference.
TECHNICAL FIELD
[0002] The present invention relates to the technical field of
cable connect, in particular to a quick connect plug for
cables.
BACKGROUND
[0003] In the prior art, welding cables are fitted and connected to
other welding cables or welding equipment through plug and socket.
The inner wall of the insertion hole of the socket is provided with
a guide slot along the axis direction of the insertion hole. The
end of the guide slot is connected to a spiral slot. The spiral
slot is arranged at the inner annular surface of the insertion
hole, and the axis of the spiral slot coincides with the axis of
the insertion hole. The front end of the plug is provided with a
protruded locking head. During connection, the plug is inserted
along the guide slot of the socket, and then the plug is rotated so
as to make the locking head of the plug rotate along the spiral
slot. The end face of the plug closely fit the end face of the
socket after tightening. In this structure, as both, the plug and
the socket are of integral steel structure, the operating distance
between tightening and loosening is only 1-2.5 mm during use.
During production and operation, the locking head of the plug
easily gets loose from the slot due to factors such as handling,
vibration, collision, expansion and contraction, and pulling of
cables etc. The loosening of the locking head causes insufficient
connection and unstable current on the contacting surface. When
large current flows through, the plug and socket will heat up, and
may burn the connector, thereby causing fire hazards.
SUMMARY
[0004] The objective of the present invention is to provide a quick
connect plug for cables which can realize convenient and reliable
plug-in connect.
[0005] In order to achieve the above-mentioned objective, the
present invention adopts the following technical solution. A quick
connect plug for cables includes a connecting portion configured to
connect a cable and a plug pin configured to form a plug-in
connection with a socket. The plug pin is fixedly provided with a
plug-in unit. A portion of the plug-in unit protruding out of an
external annular surface of the plug pin forms a locking head
matched with the socket slot. A gap is provided between a portion
of the plug-in unit near the locking head and the plug pin, so as
to enable the locking head to move along an axis direction of the
plug pin, and the gap can limit the maximum displacement of the
locking head.
[0006] Compared with the prior art, the present invention has
following technical effects. By providing a plug-in unit and
providing a gap between the portion of the plug-in unit near the
locking head and the plug pin, the plug-in unit is enabled to move,
thus having certain elasticity. During assembly, due to the
existence of elastic force, even though external force is applied
on the plug, the plug-in unit will not be damaged, so the
phenomenon where the locking head of the plug gets loose from the
slot will not occur, thereby ensuring an extremely reliable
connection between the welding cables or between the welding cable
and welding equipment.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIGS. 1a-1c are structural schematic diagrams of Embodiment
1 of the present invention;
[0008] FIGS. 2a and 2b are structural schematic diagrams of
Embodiment 2 of the present invention;
[0009] FIG. 3a-3c are structural schematic diagrams of Embodiment 3
of the present invention;
[0010] FIGS. 4a-4e are structural schematic diagrams of Embodiment
4 of the present invention;
[0011] FIGS. 5a-5e are structural schematic diagrams of Embodiment
5 of the present invention;
[0012] FIG. 6 is a structural schematic diagram of Embodiment 6 of
the present invention.
DETAILED DESCRIPTION OF EMBODIMENTS
[0013] The present invention will be described in detail with
reference to FIGS. 1a-1c to FIG. 6, hereinafter.
[0014] With reference to FIGS. 1a-1c to FIG. 6, a quick connect
plug for cables includes connecting portion 10 configured to
connect the cable and plug pin 20 configured to form a plug-in
connection with a socket. The plug pin 20 is fixedly provided with
plug-in unit 21, and the portion of the plug-in unit 21 protruding
out of the external annular surface of the plug pin 20 forms a
locking head 211 which is matched with the socket slot. The plug-in
unit 21 is fixedly connected to the plug pin 20. Gap 212 is
provided between the portion of the plug-in unit 21 near the
locking head 211 and the plug pin 20, so as to enable the locking
head 211 to move along the axis direction of the plug pin 20. The
gap 212 can limit the maximum displacement of the locking head 211.
By providing the plug-in unit 21 and the gap 212 between the
portion of the plug-in unit 21 near the locking head 211 and the
plug pin 20, the plug-in unit 21 is enabled to move and has a
certain elasticity. During assembly, due to the existence of
elastic force, even though external force is applied on the plug,
the plug-in unit 21 will not be damaged, so the phenomenon where
the locking head 211 of the plug gets loose from the slot will not
occur, thereby ensuring an extremely reliable connect between the
welding cables or between the welding cable and welding
equipment.
[0015] As a preferred embodiment of the present invention, one end
of the plug-in unit 21 protruding out of the external annular
surface of the plug pin 20 forms the locking head 211, and the
other end of the plug-in unit 21 is fixedly connected to the plug
pin 20. In this structure, there is only one locking head 211. Due
to existence of the gap 212 at the side of the locking head 211,
one locking head 211 is sufficient to ensure reliable connection
between the plug and the socket. Alternatively, the following
solution may also be used. Both ends of the plug-in unit 21
protrude out of the external annular surface of the plug pin 20 to
form locking heads 211, and the two locking heads 211 are
symmetrical with respect to the center of the plug pin 20. The
middle portion of the plug-in unit 21 is fixedly connected to the
plug pin 20. Here, two locking heads 211 are provided. Although the
arrangement of two locking heads 211 is a bit more complex, the
reliability increases. According to Embodiments 1, 2, 3, 4 and 5,
one locking head 211 is used, and according to Embodiment 6, two
locking heads 211 are used, the section view thereof is shown in
FIG. 6. Since Embodiment 6 is similar to Embodiment 3 except for
two locking heads 211 are used, merely one figure is provided
herein and the details are not described. Embodiment 3 may be
referred for the specific structure. Similarly, the structure of
two locking heads 211 may be used in other embodiments.
[0016] Many structures may be used to form the gap 212 between the
plug-in unit 21 and the plug pin 20, and multiple embodiments are
described in detail in the present invention.
[0017] With reference to FIGS. 1 and 2, preferably, the plug pin 20
is provided with stepped hole 22. The stepped hole 22 includes a
small hole section and a large hole section. The plug-in unit 21 is
a straight rod. One end of the straight rod is inserted into the
small hole section and they are in an interference fit.
Alternatively, the straight rod and the small hole section are in a
screw thread fit. Any matching mode is acceptable as long as one
end of the straight rod and the small hole section can be fixedly
connected to each other. The other end of the straight rod passes
through the large hole section and extends out of the external
annular surface of the plug pin 20 to form the locking head 211.
Moreover, the diameter of the straight rod is less than the
diameter of the large hole section. The axes of the small hole
section and the large hole section are perpendicular to the axis of
the plug pin 20. By providing the stepped hole 22 and configuring
the plug-in unit 21 as a straight rod, the gap 212 is formed
between the straight rod and the large hole section. In practical
application, the gap 212 must exist at the side of the plug-in unit
21 away from the connecting piece 10, and the gap may be or may not
be provided on the other side. Therefore, the small hole section
and the large hole section may be concentrically arranged, or the
side of the small hole section near the connecting portion 10 may
be aligned with the side of the large hole section near the
connecting portion 10. For the latter solution, actually, it can be
understood as the large hole section and the small hole section
being eccentrically arranged. When the small hole section and the
large hole section are concentrically arranged, there is gap 212
surrounding the plug-in unit 21. When the side of the small hole
section near the connecting portion 10 is aligned with the side of
the large hole section near the connecting portion 10, and the side
of the plug-in unit 21 away from the connecting piece 10 has the
gap 212. Usage demands are satisfied in both scenarios.
[0018] The section profiles of the plug-in unit 21 and the stepped
hole 22 may come in many shapes, for example, round, waist shape,
square or elliptic. The section profile is round in Embodiment 1,
and the section profile is waist-shaped in Embodiment 2. Certainly,
other shapes are also acceptable, and they are not described in
detail hereinafter.
[0019] With reference to FIG. 3, in Embodiment 3, the plug pin 20
is provided with through hole 23, and the plug-in unit 21 is a
straight rod. The straight rod includes the large-diameter rod
section and the small-diameter rod section. The large-diameter rod
section is inserted into the through hole 23 and the large-diameter
rod section and the through hole 23 are in an interference fit.
Alternatively, the large-diameter rod section and the through hole
23 are in a screw thread fit. The small-diameter rod section passes
through the through hole 23 and extends out of the external annular
surface of the plug pin 20 to form locking head 211. Moreover, the
diameter of the small-diameter rod section is less than the
diameter of the through hole 23. The axis of the through hole 23 is
perpendicular to the axis of the plug pin 20. The small-diameter
rod section and the large-diameter rod section are concentrically
arranged, or the side of the small-diameter rod section near the
connecting portion 10 is aligned with the side of the
large-diameter rod section near the connecting portion 10. The
section profiles of the straight rod and the through hole 23 may be
round, waist-shaped, square, or elliptic. This structure is similar
to the previous structure, the difference is that the hole is the
stepped hole 22 and the plug-in unit is a straight rod in the
previous two embodiments. Here, the hole is through hole 23, and
the plug-in unit 21 is a stepped rod.
[0020] With reference to FIGS. 4 and 5, the end face of the side of
the plug pin 20 away from the connecting piece is provided with the
recess 24. The plug-in unit 21 is plate-like and located in the
recess 24. In addition, one end of the plug-in unit 21 extends out
of the external annular surface of the plug pin 20 to form the
locking head 211. The side of the plug-in unit 21 away from the
connecting piece is provided with a pressing plate 25. The side of
the plug-in unit 21 away from the locking head 211 fits the
pressing plate 25 and is fixed on the plug pin 20 with a screw. Gap
211 is formed between the portion of the plug-in unit 21 near the
locking head 211 and the pressing plate 25. The fixation of the
plug-in unit 21 and the formation of gap 212 are achieved by
providing the recess 24 and pressing plate 25. The plug-in unit 21
has a uniform thickness, and the side of the pressing plate 25 near
the locking head 211 is wedge-shaped, or the plate thickness of the
side of the pressing plate 25 near the locking head 211 is less
than the plate thickness of the side of the pressing plate 25 away
from the locking head 211 to form the gap 212. The pressing plate
25 has a uniform thickness, and the side of the plug-in unit 21
near the locking head 211 is wedge-shaped, or the plate thickness
of the side of the plug-in unit 21 near the locking head 211 is
less than the plate thickness of the side of the plug-in unit 21
away from the locking head 211 to form the gap 212.
[0021] As shown in FIG. 4 of Embodiment 4, the side of the pressing
plate 25 near the locking head 211 is wedge-shaped. As shown in
FIG. 5 of Embodiment 5, the plate thickness of the side of the
pressing plate 25 near the locking head 211 is less than the plate
thickness of the side of the pressing plate 25 away from the
locking head 211. In these two embodiments, the thickness of the
plug-in unit 21 is uniform. Certainly, the user may also select the
pressing plate 25 with a uniform thickness, and the plug-in unit 21
with changing thickness to form the gap 212.
* * * * *